davis



(No Model.)

" O. H. DAVIS.

swBLL FOR REED oneAus. No. 278,515. Patented May 29,1883.

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UNITE STATES PATENT OFFICE.

CHARLES H. DAVIS, OF WASHINGTON, NElV JERSEY, ASSIGNOR TO DANIEL F. BEATTY, OF SAME PLACE.

SWELL FOIR REED-ORGANS.

SPECIFICATION forming part of Letters Patent No. 278,515, dated May 29, 1883.

Application filed September 25,1882. (N0 model.)

To all whom it may concern:

Be it known that I, CHARLES H. DAVIS, of Washington, in the county of Warren and State of New Jersey, have invented certain new and useful Improvements in Swells for Breed-Organs, of which the following is a full, clear, and exact description.

The object of my invention is to provide for obtaining a full volume of sound when required, and also for the regulation of the swell in a more perfect manner than is possible with the device usually employed.

To that end my invention consists in the combination of a pivoted shutter-swell with a hinged swell in such a manner that the swells act to throw the sound upward from the reed, and when fully opened give the freest possible escape to the volume of sound, as hereinafter described and claimed.

,Reference is to be had to the accompanying drawing, in which my improvement is shown by a cross-sectional perspective view of a reedboard and the attached parts.

Ais the reed-board. B B are thereed-blocks, and G O are the motes, these parts being as usual. Upon the reed-board,and covering the reed-blocks, is a box consisting of a fixed back portion, a, a top board, b, a flap or swell, c, hinged to the board I), and a shutter-swell, d, that is pivoted at its ends and forms one side of the box. The hinged swell c is of such a width that its edge by which it is pivoted to the board I) is at the rear of the. upper mute, C,

so that when this swell is opened it gives a wide and free escape to the sound. The pivoted swell d, formingthe side of the box in front of the mutes, is to be turned for opening in the direction shown by the dotted line, so that by its position it tends to throw the sound upward and outward toward the fretwork of 40 the instrument. The two swells c and dare to be fitted for movement by the usual device, the shutter-swellgl being used for ordinary purposes and the swell 0 when an increase of sound is wanted. As the swell 01 opens at 5 both edges at once, a slight movement insures a considerable opening, and when both the swells stand 0 are fully open the reed-board is entirely uncovered, so that there is nothing to hinder the free escape of the full volume of sound. When the swells are closed the box formed thereby acts to improve the tone of the instrument.

It is to be noticed that this swell is combined with the action of the instrument, and in a 5 manner to obtain the most perfect graduations and best possible effect.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- The swell for organs, consisting of the shutter 6?, balanced to swing upon pivots in the centers of its two ends, in combination with the flap 0, meeting the shutter 01 at a right angle when closed, and hinged at its opposite edge to swing away therefrom when open,

whereby both the shutter and the flap swing away from their lineof juncture, permitting the sound to escape in a single volume.

CHARLES H. DAVIS.

Witnesses:

LEWIs G. BEATTY, LoUIs J. HANN. 

